DCA24LA065

NTSB accident investigation · Boeing 737 · Houston, TX · January 10, 2024

Accident · No injuriesClass 4 · LimitedFinal report
Date
January 10, 2024, 10:10 local (16:10 UTC)
Place
Houston, TX
Injuries
185 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N62883Boeing 737
Defining event
Landing-flare/touchdown: Tailstrike
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Major Investigations Division
Parties
Federal Aviation Administration, United Airlines
Case key
193637

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The airplane’s aft fuselage impacted the runway as a result of a delayed flare and subsequent nose-high pitch inputs during the aircraft’s multiple touchdowns.

Findings · 1

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Action: delayed actionPersonnel issues › Action/decision · CopilotBoeing 737-924ER: 1 caseAll aircraft: 894 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

United Airlines flight 2498 experienced a tail strike while landing at George Bush Houston Intercontinental Airport (IAH), Houston, Texas. The flight was a regularly scheduled domestic passenger flight from Phoenix Sky Harbor Airport (PHX), Phoenix, Arizona to IAH. The flight crew statements and flight data showed a stable approach to the landing flare. The first officer was pilot flying and stated he began the flare slightly late. Both crewmembers stated the touchdown was firm with a slight “nose-high” bounce. The flight crew was not aware the airplane’s tail had impacted the runway until the ground crew at the gate notified them. Flight data showed that the airplane touched down on the runway with a 6.5-degree nose-up attitude and vertical acceleration of 1.87g. The speed brakes deployed two seconds after the initial touchdown. At the same time, the aircraft became airborne again and the nose began to lower. Two seconds later, as the speed brakes retracted, the airplane’s pitch began to increase, and the airplane touched down a second time with pitch of 7.2 degrees and a vertical acceleration of about 2.87g. The airplane became airborne for a 3rd time for about a second before it touched down for the final time. The nose was lowered to the ground, and speed brakes were extended again. Post-accident assessment of the aircraft revealed substantial damage to the auxiliary power unit (APU) firewall bulkhead that occurred as a result of the aircraft’s aft fuselage’s contact with the runway.

Aircraft

Registration
N62883
Reported as
Boeing 737 (9)
Category
Airplane
Serial number
883
Built
2015
Airframe hours
25,323
Engines
CFM CFM56-7B27E/F, 27,300 lbs thrust, turbo fanCFM CFM56-7B27E/F, 27,300 lbs thrust, turbo fan
Damage
Substantial damage
Flight
Part 121
Operator
United Airlines Inc
Registered owner
United Airlines Inc
Airworthiness certificate
Standard, Commuter; Standard, Transport; Standard, Normal
Last inspection
Continuous airworthiness · April 18, 2023
Departed
PHX · Phoenix, AZ
Destination
Same as departure
Flight plan
IFR
Airport
KIAH · Houston George Bush Intercontinental Airport, runway 27, 10,000 × 150 ft, concrete
Equipment
Angle of attack indicator, Auto-pilot, Data recorder, Electronic flight bag or handheld device, Electronic multifunction display, Electronic primary flight display, Onboard weather, Satellite tracking device, Stall warning system, ADS-B

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
62
Injuries
None
Certificates
Flight engineer, Airline transport, Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
July 9, 2023
Seat
Left
Restraint
4-point
Flight hours
31,700 total · 21,200 in this make and model · 18,540 as pilot in command · 180 in the last 90 days · 14 in the last 30 days · 0 in the last 24 hours
Role
Co-pilot
Age
45
Injuries
None
Certificates
Commercial, Private, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
December 28, 2023
Seat
Right
Restraint
4-point
Flight hours
5,187 total · 896 in this make and model · 962 as pilot in command · 155 in the last 90 days · 106 in the last 30 days · 51 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Lowest ceiling
None

Docket · 5

The files NTSB released with the investigation on May 17, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.5 MB in all.